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Chapter 19 Review

Total questions: 57

Worksheet time: 1hrs 7mins

Name
Class
Date
1.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
2.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
3.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
4.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
5.
How many Mn atoms are found in the following compound?
3Cr(MnO4)6
a)
3
b)
4
c)
6
d)
18
6.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
7.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
8.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
9.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
10.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
11.
Is the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2
a)
yes
b)
no
12.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
13.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

14.

Balance the following equation:

___ Mg+ ___ O2→___ MgO

a)

1, 1, 3

b)

2, 1, 2

c)

1, 2, 1

d)

2, 2, 2

15.

Balance the following equation:

___ H2+ ___ O2→___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

16.

Balance the following equation:

___ SeCl6+ ___ O2→___ SeO2+____Cl2

a)

1, 1, 1, 3

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 4

17.

List four factors that affects the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

e)

catalysts

18.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

19.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

20.
What does NOT happen when the temperature is increased?
a)
Particles collide more often
b)
Particles collide with more energy
c)
Particles move faster
d)
More particles collide in the correct orientation
21.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
22.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

23.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

24.

The ______________is required to break the bonds of the reactants.

a)

Carbonic energy

b)

Activation energy

c)

Plutonic energy

d)

Energi Gaib

25.
What makes an effective collision?
a)
When molecules collide.
b)
When molecules collide with the proper orientation.
c)
When molecules collide with proper orientation and enough kinetic energy.
d)
High Temperature.
26.
Why don't all collisions between particles cause a reaction?
a)
the particles also need to collide with a catalyst
b)
not all the particles collide with enough energy
c)
not all the particles collide at a high enough temperature
d)
the particles need to collide with each other twice
27.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
28.

As the frequency of ______________ increases, the rate of reaction increases.

Hint: frequency means how often

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

29.

You add more people into an enclosed space in hope for more collisions. You have increased:

a)

temperature

b)

concentration

c)

pressure

d)

catalyst

30.

What is the measure of how fast molecules are moving?

a)

Speedometer

b)

Volume

c)

Temperature

d)

Thermometer

31.

In EXOTHERMIC reactions, energy is _____ from the reaction to the surroundings.

a)

Absorbed

b)

Released

c)

Eliminated

d)

Evaporated

32.

In ENDOTHERMIC reactions, energy is _____ by the reaction system from the surroundings.

a)

Absorbed

b)

Released

c)

Eliminated

d)

Obliterated

33.

What usually happens to TEMPERATURE in an ENDOthermic reaction?

a)

Increases

b)

Decreases

c)

Stays the same

34.

Temperature usually _____ in EXOthermic reactions.

a)

Stays the same

b)

Increases

c)

Decreases

35.

Photosynthesis is an _____ reaction.

a)

EXOthermic

b)

ENDOthermic

36.

Cooking and baking are _____ reactions.

a)

EXOthermic

b)

ENDOthermic

37.

The starting temperature of a reaction was 21 degrees Celsius and the ending temperature was 44 degrees Celsius. What type of reaction occurred?

a)

EXOthermic

b)

ENDOthermic

38.

If a chemical reaction produces light or sound, it is likely a _____ reaction.

a)

EXOthermic

b)

ENDOthermic

39.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
40.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
41.
What do the coefficients need to be in the following equation in order to be balanced?
_Al +_HCl → _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
42.
What do the coefficients need to be in the following equation in order to be balanced?
_CH4 + _O2 → _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
43.
What do the coefficients need to be in the following equation in order to be balanced?
_Mg + _Cl2 → _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
44.
Classify
Zn + H2S → ZnS + H2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
45.
Classify
FeS + HCl → H2S + FeCl2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
46.
Classify
Fe + O2 → Fe2O3
a)
synthesis
b)
decomposition
c)
double replacement 
d)
single replacement
47.

In a chemical equation, is it true that -

a)

the reactant side and product side can have different numbers of atoms for each element

b)

there can be different elements on the reactant side and the product side

c)

the reaction must always take place in a closed system in order for it to work

d)

the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

48.
AB + CD →AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
49.

Classify:

2KClO3 ---->2KCl + 3Os

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

50.

Classify:

2HCl + 2NaOH -----> NaCl + H2O

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

51.

Reactants combine to produce one product.

a)

single replacement

b)

double replacement

c)

synthesis

d)

combustion

52.

One reactant breaks down to produce simpler substances.

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

53.

One element replaces another in a compound, if it is more reactive.

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement reaction

d)

double replacement reaction

54.

Classify:

2 NaOH + H2CO3 --> Na2CO3 + 2 H2O

a)

combustion reaction

b)

decomposition reaction

c)

single replacement reaction

d)

neutralization reaction

55.

Classify the reaction. Check all that apply.

3Li + FeCl3 → 3LiCl + Fe

a)

Synthesis

b)

Decomposition

c)

Single-Replacement

d)

Double-Replacement

e)

Combustion

56.

Classify the reaction. Check all that apply.

2Al2O3 → 4Al + 3O2

a)

Synthesis

b)

Decomposition

c)

Single-Replacement

d)

Combustion

e)

Double Replacement

57.

Classify the reaction. Check all that apply.

3Ti + 2N2 → Ti3N4

a)

Synthesis

b)

Precipitation

c)

Single-Replacement

d)

Double-Replacement

e)

Decomposition

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